LG MULTI V 5 Manual Book page 26

Multi V 5
3. Piping Diagrams
■ Low HEX Defrost Operation
Low HEX Defrost Operation
Indoor HEX EEV
Fan
Indoor Unit
Fan
Motor
Outdoor
Sub 4-Way Valve
Temperature
Sensor
High Pressure
Sensor
Active
Outdoor Unit HEX
Path
Temperature Sensor
Main 4-Way
Valve
Low
Low Hot
Outdoor Unit HEX Outdoor
Pressure Sensor
Vapor Valve
Temperature Sensor Unit HEX
Suction
Temperature
Temperature
Sensor
Comp 1
Sensor
Discharge
Upper Hot
Temperatue Sensor
Vapor Valve
Receiver
Receiver
Outlet
Accum
Upper Outdoor EEV
Low Outdoor
SC
EEV Receiver
Inlet Suction
Oil Return
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling Circuit Inlet
Temperature Sensor
Heatsink
Pressure Sensor Temperature Sensor
Remarks
Pressure Switch SVC Valve
050
_TROUBLE SHOOTING GUIDE BOOK
Outdoor Units
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
Indoor HEX EEV
Fan
Indoor Unit
Pressure Switch
Oil Separator Oil Separator
Comp 2
Discharge
Temperatue Sensor
Oil
Inverter Inverter
Balance
Comp 1 Comp 2
Comp 1 Vapor Comp 2 Vapor
Injection Injection
High / Low Pressure Vapor Pipe
Low Pressure Vapor Pipe
Liquid Pipe
Sub-Cooling HEX
Liquid Pipe
Temperature Sensor
SC
EEV
Check Valve Solenoid Valve
EEV Strainer
Piping Diagrams
HR Unit
1. HR Unit
Low pressure gas pipe
Piping Diagrams
Th2
Liquid pipe
1. HR Unit
B
Th1
High pressure gas pipe
Low pressure gas pipe
Liquid pipe
B
s
D
s
High pressure gas pipe Solenoid
EEV
Sensor Temperature Sensor
s
Ⓐ : To be switched operation between cooling and heating by two Solenoid valve D
s
Symbol Description
Solenoid
Ⓑ : To be used decreasing noise according to sub-cooling of inlet and outlet of indoor unit
Th1 Sub Cooling In Temperature Sensor
(Simultaneous operation)
Ⓒ : To prevent liquid charging between high pressure gas valve and HR unit at cooling mode Th2 Sub Cooling Out Temperature Sensor
EEV
Ⓓ : To be controlled the pressure between high and low pressure pipe during operation switching
Th3 Luquid Receiver Temperature Sensor
Sensor
Ⓐ : To be switched operation between cooling and heating by two Solenoid valve
Ⓑ : To be used decreasing noise according to sub-cooling of inlet and outlet of indoor unit
(Simultaneous operation)
Ⓒ : To prevent liquid charging between high pressure gas valve and HR unit at cooling mode
Ⓓ : To be controlled the pressure between high and low pressure pipe during operation switching
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Copyright ©2017 LG Electronics. Inc. All right reserved.
Piping Diagrams
Piping Diagrams
Th3
s
C
A
s s
s s s s s s
s
C
s
s
s
A
s
s s s s s
s s
s
s
s
PCB Connector
SN_SEN_02(SC_IN)
SN_SEN_02(SC_OUT)
SN_SEN_02(LIQUID)
- 59 -
LGE Internal Use Only
051
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- 59 -
LGE Internal Use Only